Pamela deposited $30 in a savings account earning 5% interest, compounded annually.

to the nearest cent, how much interest will she earn in 3 years?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Can someone me out here number 4 plz